my website up until last week was one of the best ranking websites for all the suburbs in my capital city with respect to patios and carports. I did this buy adding a tag for each suburb and using the tag page to effectively make a different page for each suburb. Another site did this and they rank great too (we were 1 and 2). Suddenly my site has fallen off the earth as far as Google goes. Nothing appears to have changed EXCEPT google found a few hundred old url craml errors since the old sitemap. could that cause it? would the tags pages cause it?